Chemical conditioning prior to disposal is a common practice in biotech companies to stabilize the biological waste generated during production. Nevertheless, the state of the art models used to analyze management strategies in water treatment systems (WTS) do not include the effect of high alkaline conditions during bio-solids processing. In this paper, the prediction capabilities of a novel model-based approach describing the effect of quicklime addition (CaO) on the waste streams of an industrial WTS is assessed. Two measuring campaigns were carried out taking samples of TSS, VSS and total/soluble COD, N, P, S and multiple metals before and after chemical stabilization, and dewatering under and overflow. Mass balances were set up and Sankey diagrams were generated to represent the occurrence, transformation and fate of the major compounds within the studied facility. A simulation model was used to predict plant at different locations. Next, a scenario analysis was carried out in order to assess potential alternatives to the current operational practice. The resulting mass balances show a mismatch between the system's input and output up to 17%. It was also possible to identify different types of compound-behavior depending on the effect that high pH induced on the soluble and particulate fractions hydrolysis, precipitation and unaltered. Model predictions and measurements differed 9.6% (steady state) and 12.4% (dynamic state) respectively. Finally, in the scenario analysis, the model suggested that the change from quicklime to sodium hydroxide (NaOH) would increase the quantity of organics in the dewatered cake (+23%), but with a considerable increase in chemical consumption (+50%). The selective stabilization of the incoming streams has the lowest use of chemicals (-30%) and reduces the load of CODsol (-13%) and TNsol (-14%) recirculated to the water line of the WWTP.The objective of this study was to measure the burden of burnout in a sample of healthcare workers (HCWs) consisting of general practitioners, professors from the Faculty of Medicine and Surgery, nurses, medical students and nursing students.
Cross-sectional questionnaire survey.
A descriptive analysis was carried out, using averages, medians, standard deviations (SD) and ranges for quantitative variables. Univariate, bivariate and multivariate analyses were also performed.
In total, 535 HCWs completed the survey. Multivariate analysis shows that increasing age (β=-0.183; P=0.047), being a university professor (β=-0.118; P=0.001), having a high physical score (β=-0.370; P&lt;0.001) and a high mental score (β=-0.574; P&lt;0.001) resulted in less personal burnout. Low work burnout was associated with being a student (β=-0.144; P&lt;0.001), a university professor (β=-0.146; P&lt;0.001), having a high physical score (β=-0.366; P&lt;0.001) and having a high mental score (β=-0.648; P&lt;0.001). Being female (β=-0.122; P&lt;0.001), a university professor (β=-0.333; P=0.001), a student (β=-0.433; P&lt;0.001), having a high physical score (β=-0.26; P&lt;0.01) and having a high mental score (β=-0.460; P&lt;0.001) were predictors for reduced client burnout. https://www.selleckchem.com/products/pu-h71.html However, high client burnout was seen in individuals who had a commuting time &gt;30min (β=0.084; P=0.012) predicts.
This study shows that burnout is an important issue among HCWs and that prevention strategies must be considered, with a particular focus on physical and mental health.
This study shows that burnout is an important issue among HCWs and that prevention strategies must be considered, with a particular focus on physical and mental health.This study designed to conduction an investigation into the effect of low-voltage electric field (EF) on the phenolic acids extraction from plant materials. In this regards, Nepeta racemosa was selected to study as a source of phenolic acids. The EF extracted phenolic acids amounts were compared with ultrasound-assisted and maceration extractions. Suitable extraction condition was optimized for ultrasound-assisted extraction. The EF method was optimized for voltage (40, 50 and 60?V) and electrodes gap (1, 1.5, 2 and 2.5?cm). Phenolic acid amounts and antioxidant activity of extracts were investigated by HPLC and DPPH radical methods, respectively. The optimal condition for EF method extraction of total studied phenolic acids amount was obtained 2.5?cm of electrodes gap and 40?V for applied voltage. The results showed a considerable increasing in total phenolic acid amounts and antioxidant activity for EF comparison with other methods. Total phenolic acid amount and antioxidant activity of maceration, ultrasound-assisted and EF extraction methods were obtained as 3.58, 7.57, 19.88?mg/g dw of plant and IC50 values of 110.77, 81.44, 43.74?μg/mL, respectively. Based on obtained results, EF extraction method caused to increase of phenolic acids amounts 3-4 times and antioxidant activity 2-3 times rather that other methods. The findings for Nepeta racemosa extract suggest application of electric field extraction method for food and industrial purposes because of increasing bioactive compounds recovery and decreasing of time and cost.Epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI) acquired resistance remains a major barrier in the clinical treatment of lung adenocarcinoma with epidermal growth factor receptor (EGFR) mutations. Despite extensive efforts, mechanism of acquired resistance has not yet been elucidated clearly. The subject of this study was to characterize the metabolic signatures relevant to acquired EGFR-TKI resistance in pleural effusion (PE), and identify potential biomarkers in PE of patients with acquired EGFR-TKI resistance. PE from EGFR-TKI untreated group (n?=?30) and EGFR-TKI resistant group (n?=?18) was analyzed using liquid chromatography-mass spectrometry (LCMS) based metabolomic. Multivariate statistical analysis revealed distinctive di? ;erences between the groups. A total of 34 significantly differential metabolites in PE were identified, among which, the acquired EGFR-TKI resistant group had higher levels of l-lysine, taurine, ornithine and citrulline, and lower levels of l-tryptophan, kynurenine, l-phenylalanine, l-leucine, N-formyl-l-methionine, 3-hydroxyphenylacetic acid and N-acetyl-d-phenylalanine in PE than that of the EGFR-TKI untreated group.